Ch9 Act 7-Muscle Scenarios The following scenarios are based on what you have le
ID: 3514263 • Letter: C
Question
Ch9 Act 7-Muscle Scenarios The following scenarios are based on what you have learned about muscle tissue. Read each scenario, then in a brief paragraph, answer the question or explain the situation. Your answers should be brief, but full. Each scenario is worth a total of 4 points based on the rubric below. You may write your responses in the space below each scenario. Save the document and return it to the instructor. Total 12 pts score) Exemplary (4 points) o demonstrates full understanding of the question o directly answers the question o presents answer in a logical manner o uses acceptable style and grammar o as above but less thorough in answer o does not clearly make point o same as above but less consistent and complete o a few (2-3) grammatical or spelling errors o reflects a limited understanding of the question o explanations incomplete o does not address the question(s) directly writing style adequate but with several (4-8) errors o does not demonstrate an understanding of the question or is (3 points) Adequate (2 points) Needs inaccurate o does not answer the questiorn o is not clearly or logically organized o fails to use acceptable style and grammar (1 point) No answer (0 points 1. Ramona is a successful college student who is trying to stay in shape. She has been told that the best thing to do is a combination of aerobic and anaerobic (resistance) exercises. In two paragraphs, one for each tvpe of exercise, Describe the general effects each type of exercise would produce in her skeletal muscle tissue as well as any changes in skeletal muscle fiber tvpes making up her muscles Provide one example of each type of exercise she might undertake . . 2. John broke his leg in a football game and after 6 weeks the cast is finally removed. As he steps down from the examination table he loses his balance and falls. Why might this be the case, after all his bone has healed just fine. What will be recommended to help with his condition. 3. Distance runners typically consume large amounts of carbohydrates (usually pasta) the day or days before a long race. Some people refer to this as "carbohydrate loading" e What is the purpose of carbohydrate loading (what specfically is the runner trying to do with regard to skeletal muscle tissue) How might his heup durung o long raceExplanation / Answer
1. Aerobic exercise can increase endurance power of muscle ( type I and type IIb ) by increasing blood flow, oxygen flow to muscle fibre and converting type IIa muscle fibres to type IIb muscle fibres. This process reduce lactic acid production by muscle fibre thereby reducing the fatiguability of muscle fibres. this exercise process produces energy from pyruvate more effectively by increasing the conentration of repiratory enzymes in muscle fibres.
Example: Cycling, swimming ramona can do this.
Anaerobic exercise induce anaerobic respiration in type IIa musle fibres, thereby increasing lactic acid in muscle and thereby increasing the muscle's ability to cope with anaerobic condition. This type of exercise leads to increase in muscle strength, muscle mass. In this type of exercise more glucose is burnt and and adipose tissue is used to build up the m,uscle mass.
Anaerobic exercise example: Dancing, walking, staircase riding.
2. As John did not use his muscles of leg for 6 weeks. So, leg muscle mass, power of contraction has beed reduced . Non use of his leg muscle reduced concentration of muscle enzymes( needed for ATP production for contraction), reduced muscle glycogen level, and/or insensitivity to acetyl choline is responsible for this. These all conditions lead to less powerful muscle contraction and easy fatigability of muscles in affected leg causing the imbalance( that is why patients are advised to move his finger durin cast immobilisation after breakage, which limits these inactivity related changes in muscle fibre to a great extent) and made John fall.
John should be advise to do aerobic exercise to adapt his leg muscle. He should be advised slow walking with or without support.
3.Long running is an endurnce sport ( aerobic ). In this type of running muscle needs energy at slower but continuous rate. Muscle generates energy ( ATP needed for muscle contraction) from glucose. So during long running, muscle will need lots of energey and so lots of glucose. During long term production energy muscle stimulate body system to produce more glucose into blood form stored glycogen in muscle and liver ( first muscle glycogen, then liver glycogen ). So consumed excess glucose days before race is converted into glycogen and stored in muscle and liver for future use by muscle fibres . Thus these glycogen helps the runner run more efficiently without muscle fatigue.